121202211012021 has 40 divisors (see below), whose sum is σ = 185268347884224. Its totient is φ = 78921258897600.

The previous prime is 121202211011983. The next prime is 121202211012121. The reversal of 121202211012021 is 120210112202121.

121202211012021 is a `hidden beast` number, since 121 + 20 + 221 + 101 + 202 + 1 = 666.

It is not a de Polignac number, because 121202211012021 - 2²¹ = 121202208914869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121202211011985 and 121202211012003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202211012121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 300036240 + ... + 300439926.

Almost surely, 2^{121202211012021} is an apocalyptic number.

It is an amenable number.

121202211012021 is a deficient number, since it is larger than the sum of its proper divisors (64066136872203).

121202211012021 is an equidigital number, since it uses as much as digits as its factorization.

121202211012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489943 (or 489934 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121202211012021 its reverse (120210112202121), we get a palindrome (241412323214142).

The spelling of 121202211012021 in words is "one hundred twenty-one trillion, two hundred two billion, two hundred eleven million, twelve thousand, twenty-one".