1021211142 has 32 divisors (see below), whose sum is σ = 2335200000. Its totient is φ = 291649248.

The previous prime is 1021211129. The next prime is 1021211153. The reversal of 1021211142 is 2411121201.

It is a congruent number.

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, 143484 + ... + 150432.

It is an arithmetic number, because the mean of its divisors is an integer number (72975000).

Almost surely, 2^1021211142 is an apocalyptic number.

1021211142 is an abundant number, since it is smaller than the sum of its proper divisors (1313988858).

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

1021211142 is a wasteful number, since it uses less digits than its factorization.

1021211142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10460.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1021211142 is about 31956.3943835972. The cubic root of 1021211142 is about 1007.0209712652.

Adding to 1021211142 its reverse (2411121201), we get a palindrome (3432332343).

The spelling of 1021211142 in words is "one billion, twenty-one million, two hundred eleven thousand, one hundred forty-two".