142221464021 has 16 divisors (see below), whose sum is σ = 175446104064. Its totient is φ = 112266964224.

The previous prime is 142221464017. The next prime is 142221464023. The reversal of 142221464021 is 120464122241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 142221464021 - 2² = 142221464017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142221464023) 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, 1765301 + ... + 1844106.

It is an arithmetic number, because the mean of its divisors is an integer number (10965381504).

Almost surely, 2^142221464021 is an apocalyptic number.

It is an amenable number.

142221464021 is a deficient number, since it is larger than the sum of its proper divisors (33224640043).

142221464021 is a wasteful number, since it uses less digits than its factorization.

142221464021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609860.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 142221464021 its reverse (120464122241), we get a palindrome (262685586262).

The spelling of 142221464021 in words is "one hundred forty-two billion, two hundred twenty-one million, four hundred sixty-four thousand, twenty-one".