20131142220242 has 32 divisors (see below), whose sum is σ = 32073058442880. Its totient is φ = 9456236190720.

The previous prime is 20131142220139. The next prime is 20131142220257. The reversal of 20131142220242 is 24202224113102.

It is a happy number.

It is a super-2 number, since 2×20131142220242² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3335567 + ... + 7168562.

It is an arithmetic number, because the mean of its divisors is an integer number (1002283076340).

Almost surely, 2^{20131142220242} is an apocalyptic number.

20131142220242 is a deficient number, since it is larger than the sum of its proper divisors (11941916222638).

20131142220242 is a wasteful number, since it uses less digits than its factorization.

20131142220242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10504898.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 20131142220242 its reverse (24202224113102), we get a palindrome (44333366333344).

The spelling of 20131142220242 in words is "twenty trillion, one hundred thirty-one billion, one hundred forty-two million, two hundred twenty thousand, two hundred forty-two".