206121020692 has 6 divisors (see below), whose sum is σ = 360711786218. Its totient is φ = 103060510344.

The previous prime is 206121020683. The next prime is 206121020767. The reversal of 206121020692 is 296020121602.

It can be written as a sum of positive squares in only one way, i.e., 190596857476 + 15524163216 = 436574^2 + 124596^2 .

It is a super-2 number, since 2×206121020692² (a number of 23 digits) contains 22 as substring.

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, 25765127583 + ... + 25765127590.

Almost surely, 2^206121020692 is an apocalyptic number.

It is an amenable number.

206121020692 is a deficient number, since it is larger than the sum of its proper divisors (154590765526).

206121020692 is a wasteful number, since it uses less digits than its factorization.

206121020692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51530255177 (or 51530255175 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 206121020692 in words is "two hundred six billion, one hundred twenty-one million, twenty thousand, six hundred ninety-two".