121456211051 has 16 divisors (see below), whose sum is σ = 150556916160. Its totient is φ = 95591685120.

The previous prime is 121456210999. The next prime is 121456211147. The reversal of 121456211051 is 150112654121.

It is a cyclic number.

It is not a de Polignac number, because 121456211051 - 2¹⁸ = 121455948907 is a prime.

It is a super-2 number, since 2×121456211051² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121456201051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12441956 + ... + 12451713.

It is an arithmetic number, because the mean of its divisors is an integer number (9409807260).

Almost surely, 2^121456211051 is an apocalyptic number.

121456211051 is a deficient number, since it is larger than the sum of its proper divisors (29100705109).

121456211051 is a wasteful number, since it uses less digits than its factorization.

121456211051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24893734.

The product of its (nonzero) digits is 2400, while the sum is 29.

Adding to 121456211051 its reverse (150112654121), we get a palindrome (271568865172).

The spelling of 121456211051 in words is "one hundred twenty-one billion, four hundred fifty-six million, two hundred eleven thousand, fifty-one".