1220101220142 has 48 divisors (see below), whose sum is σ = 3050535121920. Its totient is φ = 345215875536.

The previous prime is 1220101220137. The next prime is 1220101220189. The reversal of 1220101220142 is 2410221010221.

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

It is a congruent number.

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, 46993542 + ... + 47019497.

It is an arithmetic number, because the mean of its divisors is an integer number (63552815040).

Almost surely, 2^{1220101220142} is an apocalyptic number.

1220101220142 is an abundant number, since it is smaller than the sum of its proper divisors (1830433901778).

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

1220101220142 is a wasteful number, since it uses less digits than its factorization.

1220101220142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94013157 (or 94013154 counting only the distinct ones).

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

Adding to 1220101220142 its reverse (2410221010221), we get a palindrome (3630322230363).

The spelling of 1220101220142 in words is "one trillion, two hundred twenty billion, one hundred one million, two hundred twenty thousand, one hundred forty-two".