2102220524542 has 4 divisors (see below), whose sum is σ = 3153330786816. Its totient is φ = 1051110262270.

The previous prime is 2102220524531. The next prime is 2102220524623. The reversal of 2102220524542 is 2454250222012.

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

It is a super-2 number, since 2×2102220524542² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525555131134 + ... + 525555131137.

It is an arithmetic number, because the mean of its divisors is an integer number (788332696704).

Almost surely, 2^{2102220524542} is an apocalyptic number.

2102220524542 is a deficient number, since it is larger than the sum of its proper divisors (1051110262274).

2102220524542 is a wasteful number, since it uses less digits than its factorization.

2102220524542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051110262273.

The product of its (nonzero) digits is 25600, while the sum is 31.

Adding to 2102220524542 its reverse (2454250222012), we get a palindrome (4556470746554).

The spelling of 2102220524542 in words is "two trillion, one hundred two billion, two hundred twenty million, five hundred twenty-four thousand, five hundred forty-two".