1012021220106 has 48 divisors (see below), whose sum is σ = 2405937269736. Its totient is φ = 305515836288.

The previous prime is 1012021220087. The next prime is 1012021220131. The reversal of 1012021220106 is 6010221202101.

It can be written as a sum of positive squares in 4 ways, for example, as 818853059025 + 193168161081 = 904905^2 + 439509^2 .

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

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, 40788325 + ... + 40813128.

Almost surely, 2^{1012021220106} is an apocalyptic number.

1012021220106 is an abundant number, since it is smaller than the sum of its proper divisors (1393916049630).

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

1012021220106 is a wasteful number, since it uses less digits than its factorization.

1012021220106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81601527 (or 81601524 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1012021220106 its reverse (6010221202101), we get a palindrome (7022242422207).

The spelling of 1012021220106 in words is "one trillion, twelve billion, twenty-one million, two hundred twenty thousand, one hundred six".