121221121022110 has 32 divisors (see below), whose sum is σ = 219034194869952. Its totient is φ = 48302642280960.

The previous prime is 121221121022081. The next prime is 121221121022161. The reversal of 121221121022110 is 11220121122121.

It is a happy number.

It is a super-2 number, since 2×121221121022110² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89857702 + ... + 91196758.

It is an arithmetic number, because the mean of its divisors is an integer number (6844818589686).

Almost surely, 2^{121221121022110} is an apocalyptic number.

121221121022110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221121022110 is a deficient number, since it is larger than the sum of its proper divisors (97813073847842).

121221121022110 is a wasteful number, since it uses less digits than its factorization.

121221121022110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373748.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121221121022110 its reverse (11220121122121), we get a palindrome (132441242144231).

The spelling of 121221121022110 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, one hundred ten".