121001121021010 has 32 divisors (see below), whose sum is σ = 220991809317552. Its totient is φ = 47695888896000.

The previous prime is 121001121020977. The next prime is 121001121021017. The reversal of 121001121021010 is 10120121100121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 35453771850249 + 85547349170761 = 5954307^2 + 9249181^2 .

It is a super-2 number, since 2×121001121021010² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121001121021017) 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, 267463741 + ... + 267915760.

Almost surely, 2^{121001121021010} is an apocalyptic number.

121001121021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121001121021010 is a deficient number, since it is larger than the sum of its proper divisors (99990688296542).

121001121021010 is a wasteful number, since it uses less digits than its factorization.

121001121021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535379838.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121001121021010 its reverse (10120121100121), we get a palindrome (131121242121131).

The spelling of 121001121021010 in words is "one hundred twenty-one trillion, one billion, one hundred twenty-one million, twenty-one thousand, ten".