2121201020142 has 32 divisors (see below), whose sum is σ = 4715780234400. Its totient is φ = 706766978304.

The previous prime is 2121201020023. The next prime is 2121201020143. The reversal of 2121201020142 is 2410201021212.

It is a super-2 number, since 2×2121201020142² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121201020143) 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, 8205667 + ... + 8460222.

It is an arithmetic number, because the mean of its divisors is an integer number (147368132325).

Almost surely, 2^{2121201020142} is an apocalyptic number.

2121201020142 is an abundant number, since it is smaller than the sum of its proper divisors (2594579214258).

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

2121201020142 is a wasteful number, since it uses less digits than its factorization.

2121201020142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16668257 (or 16668251 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2121201020142 its reverse (2410201021212), we get a palindrome (4531402041354).

The spelling of 2121201020142 in words is "two trillion, one hundred twenty-one billion, two hundred one million, twenty thousand, one hundred forty-two".