101221210202120 has 16 divisors (see below), whose sum is σ = 227747722954860. Its totient is φ = 40488484080832.

The previous prime is 101221210202113. The next prime is 101221210202141. The reversal of 101221210202120 is 21202012122101.

It can be written as a sum of positive squares in 2 ways, for example, as 84773010615076 + 16448199587044 = 9207226^2 + 4055638^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1265265127487 + ... + 1265265127566.

Almost surely, 2^{101221210202120} is an apocalyptic number.

101221210202120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221210202120 is an abundant number, since it is smaller than the sum of its proper divisors (126526512752740).

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

101221210202120 is a wasteful number, since it uses less digits than its factorization.

101221210202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530530255064 (or 2530530255060 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 101221210202120 its reverse (21202012122101), we get a palindrome (122423222324221).

The spelling of 101221210202120 in words is "one hundred one trillion, two hundred twenty-one billion, two hundred ten million, two hundred two thousand, one hundred twenty".