121121022211110 has 384 divisors, whose sum is σ = 342091617753600. Its totient is φ = 29637556715520.

The previous prime is 121121022211103. The next prime is 121121022211139. The reversal of 121121022211110 is 11112220121121.

It is a happy number.

121121022211110 is a `hidden beast` number, since 1 + 211 + 210 + 2 + 221 + 11 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2291371861 + ... + 2291424719.

It is an arithmetic number, because the mean of its divisors is an integer number (890863587900).

Almost surely, 2^{121121022211110} is an apocalyptic number.

121121022211110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121121022211110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171045808876800).

121121022211110 is an abundant number, since it is smaller than the sum of its proper divisors (220970595542490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121121022211110 is a wasteful number, since it uses less digits than its factorization.

121121022211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53268 (or 53265 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121121022211110 its reverse (11112220121121), we get a palindrome (132233242332231).

The spelling of 121121022211110 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty-two million, two hundred eleven thousand, one hundred ten".