121211120122010 has 16 divisors (see below), whose sum is σ = 231014134821096. Its totient is φ = 45632421692928.

The previous prime is 121211120122003. The next prime is 121211120122031. The reversal of 121211120122010 is 10221021112121.

It can be written as a sum of positive squares in 4 ways, for example, as 121200789229129 + 10330892881 = 11009123^2 + 101641^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121211120122010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356503294307 + ... + 356503294646.

Almost surely, 2^{121211120122010} is an apocalyptic number.

121211120122010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211120122010 is a deficient number, since it is larger than the sum of its proper divisors (109803014699086).

121211120122010 is a wasteful number, since it uses less digits than its factorization.

121211120122010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713006588977.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121211120122010 its reverse (10221021112121), we get a palindrome (131432141234131).

The spelling of 121211120122010 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred twenty million, one hundred twenty-two thousand, ten".