102101221202220 has 72 divisors (see below), whose sum is σ = 312773444015760. Its totient is φ = 26957418134400.

The previous prime is 102101221202173. The next prime is 102101221202243. The reversal of 102101221202220 is 22202122101201.

It is a happy number.

102101221202220 is a `hidden beast` number, since 1 + 0 + 21 + 0 + 1 + 221 + 202 + 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 = 102101221202193 and 102101221202202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2808046210 + ... + 2808082569.

It is an arithmetic number, because the mean of its divisors is an integer number (4344075611330).

Almost surely, 2^{102101221202220} is an apocalyptic number.

102101221202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102101221202220 is an abundant number, since it is smaller than the sum of its proper divisors (210672222813540).

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

102101221202220 is a wasteful number, since it uses less digits than its factorization.

102101221202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616128895 (or 5616128890 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 102101221202220 its reverse (22202122101201), we get a palindrome (124303343303421).

The spelling of 102101221202220 in words is "one hundred two trillion, one hundred one billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty".