210121151055 has 16 divisors (see below), whose sum is σ = 336218947584. Its totient is φ = 112056245280.

The previous prime is 210121151017. The next prime is 210121151059. The reversal of 210121151055 is 550151121012.

It is not a de Polignac number, because 210121151055 - 2¹⁸ = 210120888911 is a prime.

It is a super-2 number, since 2×210121151055² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121151059) 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, 312751 + ... + 719760.

It is an arithmetic number, because the mean of its divisors is an integer number (21013684224).

Almost surely, 2^210121151055 is an apocalyptic number.

210121151055 is a deficient number, since it is larger than the sum of its proper divisors (126097796529).

210121151055 is a wasteful number, since it uses less digits than its factorization.

210121151055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046086.

The product of its (nonzero) digits is 500, while the sum is 24.

Adding to 210121151055 its reverse (550151121012), we get a palindrome (760272272067).

The spelling of 210121151055 in words is "two hundred ten billion, one hundred twenty-one million, one hundred fifty-one thousand, fifty-five".