1021100142 has 16 divisors (see below), whose sum is σ = 2042584272. Its totient is φ = 340302720.

The previous prime is 1021100141. The next prime is 1021100153. The reversal of 1021100142 is 2410011201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27792 + ... + 53052.

It is an arithmetic number, because the mean of its divisors is an integer number (127661517).

Almost surely, 2^1021100142 is an apocalyptic number.

1021100142 is an abundant number, since it is smaller than the sum of its proper divisors (1021484130).

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

1021100142 is a wasteful number, since it uses less digits than its factorization.

1021100142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32003.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1021100142 is about 31954.6575947858. The cubic root of 1021100142 is about 1006.9844840741.

Adding to 1021100142 its reverse (2410011201), we get a palindrome (3431111343).

The spelling of 1021100142 in words is "one billion, twenty-one million, one hundred thousand, one hundred forty-two".