102011221212021 has 36 divisors (see below), whose sum is σ = 167961338732096. Its totient is φ = 61824982534920.

The previous prime is 102011221211987. The next prime is 102011221212023. The reversal of 102011221212021 is 120212122110201.

102011221212021 is a `hidden beast` number, since 10 + 201 + 1 + 221 + 212 + 0 + 21 = 666.

It is not a de Polignac number, because 102011221212021 - 2⁶ = 102011221211957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102011221211985 and 102011221212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102011221212023) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1734678301 + ... + 1734737106.

Almost surely, 2^{102011221212021} is an apocalyptic number.

102011221212021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102011221212021 is a deficient number, since it is larger than the sum of its proper divisors (65950117520075).

102011221212021 is an equidigital number, since it uses as much as digits as its factorization.

102011221212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469415444 (or 3469415421 counting only the distinct ones).

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

Adding to 102011221212021 its reverse (120212122110201), we get a palindrome (222223343322222).

The spelling of 102011221212021 in words is "one hundred two trillion, eleven billion, two hundred twenty-one million, two hundred twelve thousand, twenty-one".