142131122021 has 16 divisors (see below), whose sum is σ = 163550306304. Its totient is φ = 120991892784.

The previous prime is 142131122009. The next prime is 142131122051. The reversal of 142131122021 is 120221131241.

It is a de Polignac number, because none of the positive numbers 2^k-142131122021 is a prime.

It is a super-2 number, since 2×142131122021² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142131121984 and 142131122002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142131122051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1307276 + ... + 1411818.

It is an arithmetic number, because the mean of its divisors is an integer number (10221894144).

Almost surely, 2^142131122021 is an apocalyptic number.

It is an amenable number.

142131122021 is a deficient number, since it is larger than the sum of its proper divisors (21419184283).

142131122021 is a wasteful number, since it uses less digits than its factorization.

142131122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105880.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 142131122021 its reverse (120221131241), we get a palindrome (262352253262).

The spelling of 142131122021 in words is "one hundred forty-two billion, one hundred thirty-one million, one hundred twenty-two thousand, twenty-one".