20120213042 has 4 divisors (see below), whose sum is σ = 30180319566. Its totient is φ = 10060106520.

The previous prime is 20120213041. The next prime is 20120213059. The reversal of 20120213042 is 24031202102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20110359721 + 9853321 = 141811^2 + 3139^2 .

It is a super-3 number, since 3×20120213042³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20120213042.

It is not an unprimeable number, because it can be changed into a prime (20120213041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030053259 + ... + 5030053262.

Almost surely, 2^20120213042 is an apocalyptic number.

20120213042 is a deficient number, since it is larger than the sum of its proper divisors (10060106524).

20120213042 is a wasteful number, since it uses less digits than its factorization.

20120213042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10060106523.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20120213042 its reverse (24031202102), we get a palindrome (44151415144).

The spelling of 20120213042 in words is "twenty billion, one hundred twenty million, two hundred thirteen thousand, forty-two".