131421121442 has 16 divisors (see below), whose sum is σ = 212738883840. Its totient is φ = 60529266192.

The previous prime is 131421121399. The next prime is 131421121463. The reversal of 131421121442 is 244121124131.

It is a super-2 number, since 2×131421121442² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5263808 + ... + 5288715.

It is an arithmetic number, because the mean of its divisors is an integer number (13296180240).

Almost surely, 2^131421121442 is an apocalyptic number.

131421121442 is a deficient number, since it is larger than the sum of its proper divisors (81317762398).

131421121442 is a wasteful number, since it uses less digits than its factorization.

131421121442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10553017.

The product of its digits is 1536, while the sum is 26.

Adding to 131421121442 its reverse (244121124131), we get a palindrome (375542245573).

The spelling of 131421121442 in words is "one hundred thirty-one billion, four hundred twenty-one million, one hundred twenty-one thousand, four hundred forty-two".