102021211112220 has 144 divisors (see below), whose sum is σ = 317836768747680. Its totient is φ = 26469658096128.

The previous prime is 102021211112207. The next prime is 102021211112243. The reversal of 102021211112220 is 22211112120201.

102021211112220 is a `hidden beast` number, since 10 + 202 + 121 + 1 + 112 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 102021211112193 and 102021211112202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 275892211 + ... + 276261749.

It is an arithmetic number, because the mean of its divisors is an integer number (2207199782970).

Almost surely, 2^{102021211112220} is an apocalyptic number.

102021211112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021211112220 is an abundant number, since it is smaller than the sum of its proper divisors (215815557635460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102021211112220 is a wasteful number, since it uses less digits than its factorization.

102021211112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411044 (or 411039 counting only the distinct ones).

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

Adding to 102021211112220 its reverse (22211112120201), we get a palindrome (124232323232421).

The spelling of 102021211112220 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, one hundred twelve thousand, two hundred twenty".