21142114123402 has 4 divisors (see below), whose sum is σ = 31713171185106. Its totient is φ = 10571057061700.

The previous prime is 21142114123271. The next prime is 21142114123409. The reversal of 21142114123402 is 20432141124112.

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., 16460555379921 + 4681558743481 = 4057161^2 + 2163691^2 .

It is not an unprimeable number, because it can be changed into a prime (21142114123409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5285528530849 + ... + 5285528530852.

Almost surely, 2^{21142114123402} is an apocalyptic number.

21142114123402 is a deficient number, since it is larger than the sum of its proper divisors (10571057061704).

21142114123402 is a wasteful number, since it uses less digits than its factorization.

21142114123402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10571057061703.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 21142114123402 its reverse (20432141124112), we get a palindrome (41574255247514).

The spelling of 21142114123402 in words is "twenty-one trillion, one hundred forty-two billion, one hundred fourteen million, one hundred twenty-three thousand, four hundred two".