121210012021021 has 16 divisors (see below), whose sum is σ = 152615203521408. Its totient is φ = 93514217832000.

The previous prime is 121210012021001. The next prime is 121210012021067. The reversal of 121210012021021 is 120120210012121.

It is not a de Polignac number, because 121210012021021 - 2³⁵ = 121175652282653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121210012020986 and 121210012021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210012021001) 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, 7792843710 + ... + 7792859263.

It is an arithmetic number, because the mean of its divisors is an integer number (9538450220088).

Almost surely, 2^{121210012021021} is an apocalyptic number.

121210012021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121210012021021 is a deficient number, since it is larger than the sum of its proper divisors (31405191500387).

121210012021021 is a wasteful number, since it uses less digits than its factorization.

121210012021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15585703092.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121210012021021 its reverse (120120210012121), we get a palindrome (241330222033142).

The spelling of 121210012021021 in words is "one hundred twenty-one trillion, two hundred ten billion, twelve million, twenty-one thousand, twenty-one".